Rüdersdorf was a German optical company located in Berlin in the 1920s,[1] which used the trademark Rüo for a number of lenses. The company was founded in Bremen in 1919 or 1920, manufacturing the Rüo-Optik and the Rüo-Tele-Anastigmat, based on work by Hugo Hahn[2] It was floated as the public company Optische Werke AG, Bremen in January 1922 in Bremen. On 3 March 1922 it was renamed Optische Werke Rüdersdorf A.G. and moved to Berlin.[3] The public company ceased production in February 1926 and ceased to exist in 1932. Production of lenses was carried on by Rüo Optik GmbH.[4]

Its lenses are marked "Opt-Werke Rüdersdorf-Berlin". They were distributed in Japan by J Tusashi & Co, Tokyo.[5]